CEoIP between ISR3800 and Cisco7600

Not really an MPLS issue, but it needs to run over an MPLS network. Can I use the NM-CEM-4TE1 CEoIP module in an ISR router together with the SPA-24CHT1-CE-ATM module in a 7600 router? This in order to aggregate multiple small sites with a few E1's each into a high density central location. It's purely for CEoIP and not for IMA. If this is not supported I would have to go for ISR's back to back, which is not ideal for high density centrally.